Timing Components: Application and ID

Identifying The Chain Sprockets

In combination with the use of 4-hole chain sprockets, the following parts are no longer installed on the camshaft drive:

- Thrust Washer
- Compensation Washers
(Measurements to ensure that the parts are parallel are therefore no longer required)
- Woodruff Key
- Chain Sprocket Flange
- Straight Pin

The holes drilled in the chain sprocket are intended for inserting special tool 9582 (retaining tool). This tool must be used in addition to blocking tools in order to relieve the strain on the camshaft drive when tightening.

The use of 4-hole chain sprockets is from engine number 61TOO868






A - Left chain sprocket (cylinder bank 1 - 3)
Left chain sprocket (cylinders 1 - 3) part No. 993 105 546 01
Distinctive feature: flat collar (arrow) high flange






B - Right chain sprocket (cylinder bank 4 - 6)
Right chain sprocket (cylinders 4 - 6) part No. 993 105 546 02
Distinctive feature: high collar (arrow) low flange